Tower Bridge

I took advantage of this great bargain too, by visiting the Tower Bridge Exhibit. However to anyone who wants to visit, beware: there's 206 steps leading up to the top of the tower so might not be appropriate for anyone not physically fit enough to handle it, but even still, I got to see the engine room, walked both upper walkways, saw interesting videos and facts on the bridge and then got a good deal in the gift shop too. Highly recommended and full enjoyment possible only with London Pass.